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SN74HC139QDRQ1

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Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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SN74HC139QDRQ1

Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16

SN74HC139QDRQ1 from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1G input Active-low enable input for first decoder; decoder is active when this pin is LOW.
2 1A input Select input A for first decoder.
3 1B input Select input B for first decoder.
4 1Y0 output Active-low output for first decoder; LOW when enable is LOW and A=LOW, B=LOW.
5 1Y1 output Active-low output for first decoder; LOW when enable is LOW and A=HIGH, B=LOW.
6 1Y2 output Active-low output for first decoder; LOW when enable is LOW and A=LOW, B=HIGH.
7 1Y3 output Active-low output for first decoder; LOW when enable is LOW and A=HIGH, B=HIGH.
8 GND power_in Ground, 0 V reference.
9 2Y3 output Active-low output for second decoder; LOW when enable is LOW and A=HIGH, B=HIGH.
10 2Y2 output Active-low output for second decoder; LOW when enable is LOW and A=LOW, B=HIGH.
11 2Y1 output Active-low output for second decoder; LOW when enable is LOW and A=HIGH, B=LOW.
12 2Y0 output Active-low output for second decoder; LOW when enable is LOW and A=LOW, B=LOW.
13 2B input Select input B for second decoder.
14 2A input Select input A for second decoder.
15 2G input Active-low enable input for second decoder; decoder is active when this pin is LOW.
16 VCC power_in Power supply voltage, 2 V to 6 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-16
Category Logic
Pins 16

CAD (KiCad official)

  • Symbol: SN74HC139QDRQ1
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: sn74hc139qdrq1-etched.step / sn74hc139qdrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hc139qdrq1.step / sn74hc139qdrq1.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (13 pp, sha256 ee91451ee92db7e1, retrieved 2026-09-24, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF